Jack with bladder motor



Dec. 11, 1951 R. cARNAHAN 2,577,874

' JACK WITH BLADDER lMOTOR Filed nec. 4, 195o 2 SHEETS- SHEET 1 62 Fig.

By xm/#wey Hmm Dec. 11, 1951 R, CARNAHAN 2,577,874

JACK WITH BLADDER MOTOR -Filed DSC. 4, 1950 2 SHEETS-SHEET 2 7 4a 36x'A 54' Figs Inventor Raymond Gama/mp1 y @Mm d/magy Mexm Patented Dec. 11, 1951 UNITED STAT-ES PATIEZISIT fQFFIfCE i2,577;srz4 f JACK-wrm BLADD'ER MOTOR Raymond-`Ca1nahan,MagnoliayJArk. Applicatiomnecember 4,'195o;sei-ialfNoeissis 4: Claims. 1 1

a This;inventicnrelateszto improvements .itt fluid Anf object ofi-.thief invention'gisfto Kprovideian improvedrj ackA whichis operated en uid e: preferea'blyf` air,z.thei jackabeing: of .the :type whichfinf `cludes aipluralty infiextensibly connected tubular sections, at fleastnhami'df preferably .two :fof .the lsections having va fbla'ddervthereinr andfatleast one ofthe other sections.l being 4arrangedzto 'constitute apressure .chamber',fthe` pressure .chamber having 'al' means of.' airsiiiletftoz icharge: the chainber andaalso animproved'.valveilassembiml whereizby foperationof theiava'lve; 'air' 'iund'erigmressure ffrorn :the 1 chambeiimay. be'. '.introducedlinto" '.the

bladder for extending thevarieusrtubular sec" tions, `or.airunder.pressure may be introduced through a Valve stem assembly at the end of a handle, allowing airfto'owfidownthe handle di- :rectly into the bladder-not entering @reserve tank.

Ancillary objects and ieaturesfoffimportanceY will become `apparent ,.iollowing.. the description of theillustratd' form f'the invenion.

Inthe drawings: f Figure 1 is anrelevation'aliview of 'the'devic Figure 2 isa-top viewof a'length ofhoseito be -used with'the device; -to i'niiatethe bladder-and operate the jack-,usingoutsidef'air supplyf'which, in case of anernergency;-would.:be air pressure from other tires on the car. A

Figure 3 is an elevatioriaiview of thedevi'ceiin theextendedposition;

Figure 4' is asecti'onalwiewof the device in Figure 1;

Figure 5 is a sectional view of the device as illustrated in Figure 3;

Figure 6 is an enlarged sectional view illustrating the detail of construction of the valve; and,

Figure 7 is a transverse sectional View taken substantially on the line 1-1 of Figure 5 and in the direction of the arrows.

As shown in the drawings, I have provided a device for raising and lowering objects, for example automobiles. The device comprises a jack having a base lll with three tubular housing sections l2, I4 and l5, although more or less sections may be employed as found desirable or necessary.

The lower section l2 has an outwardly directed flange i8 through which rivets or bolts 2U are passed and inasmuch as they also pass through the base l0, the bottom section or base section l2 is held fastened to the base. In order to prevent tampering with the inside of the jack and to facilitate a faster and more economical asfsemlily;@sectionv ft2, n withoutthe iange, 'maymbe :'zelectrically .welded tosthe'base l0. @An inwardly -.;zdirectedsfiangex-2 2e at thef'iipperVv open' end of Ithe tubular section I 21 constitutes--l aV sto'pf to vlimitffthe 5 outward movement of the section'l'ill ywhen-contacted bythe lower :outwardly directedflange 24 v thereof. v 5

` There'isanfiinwardly.directedalange 26^ -atnthe litop 'of the;- intermediate'. tubular* Ksection l 4f iar- Vl0 ranged to be contacted by theoutwardlyzdirected s. loweriiange .28 Tof i thef top-section :125.

Th'ereeisa vafbladder y3l). lmade* of! suitable mate- "riaL: as frubberi'forv alr rubber r compositionpeit'her naturalor synthetic; .locatedf within the tubular section1 i I 2.='.`andf;the1Y tubular xsection f lf4. Theftop *,pazrteiif.- thei-rbladder contactsl the rbottoml' wallor f panel ..3 21 tof: the'toptsection t1 #5y-:the top sectionfbeing 'c'losedg-fexceptfforlnecessaryopenings:in order rto VAfor-m. affluid; asi airychamber 64. Then top"` se'ction- :has can v"u-pper rwall'f36v from "whichithe: screw; *'38 .housedrinrathrea'dedl'sleeve Mdit! isadaptedat'rise in "orderto provide additional .frtheightfin:accordancewiththe necessitiesfiof the i:particular'operatiom performed. 25 'Anipple'AZtis lxedttothe'upper sectionfl'fand `5;'accomrnndates Lthe standard airva'lve 44. This nipple"v and valve constituteanfair inletniember orcasseinbly i usedf'forfcharging' :the fcha'mb'er- -34 ith.airfor'fother fluidun'derihigh#butlsafe fop- :fio-l'ferating'fpressures. Y

.A valve casef :is xed'ftotheupper section Til 6 .irandl'has aiportesztherinmigurefzi) 'f Tnevalve case is provided with an outlet openingiin which the upper end of a conduit 52 is threaded :islor welded. The lower end of the conduit 52 is passed through an aperture in the bottom panel 32 of the top section I=6 and is fastened by standard means in communication with the bladder Sil.

The valve case 46 is provided with a valve io chamber 5B into which the valve 58 is threaded. This valve includes a valve body 60 together with a valve stem 62. The Valve body and stem is arranged to move inwardly or outwardly of the .valve case 46 in response to rotation of the stem 62 whereby the inner end portion of the valve body opens or closes the port 48.

There is an air passage B4 extending through the valve stem 62 and a part of the valve body 60. A transverse passage 64 opens outwardly or laterally of the valve body. The passage 64 is controlled by a standard iiuid valve 66 which is threadedly disposed in the passage and the outer end of the stem is provided with external threads in order to accommodate the standard fitting 68.

A fitting is provided at the end of a flexible hose 10, the other end of the hose having a fitting 12 thereon identical to the fitting 68.

In order to hold the valve 56 in place within the valve case 46, an externally threaded plug 16 is disposed in threads provided in the valve chamber 56, the plug being provided with a bore rotatively retaining the stem 62 of the valve. A packing gland 16 is abutted by the inner end of the plug 16, this packing gland also abutting a shoulder 60 provided in the valve chamber 56.

In operation the chamber 34 may be charged by using the inlet member specifically provided for this purpose. Any type oi.' fluid adaptable maybe used, for example air, butane andothers. the jack is placed beneath the frame or axle housing or other part of the vehicle, the valvel stem 62 is rotated causing the inner end of theA valve to open the port 46. At this time'some of the uid under pressure passes through the port' 46, conduit 52 and intoithe bladder 30. Inasmuch as the bladder then becomesv pressurized the sections will extend to lift the vehicle. At the time y that the desired height of the jack is reached, the

valve stem is rotated in the opposite direction to close the port 46. v

In order to exhaust the fluid under pressure from the bladder 30 the stem of the valve 66 is operated whereby the fluid under pressure passes through the conduit 52, the transverse passages 63 and the passage 64.

In instances wherein it is desired to inflate ,the bladder 30 directlyirom an outside source, the valve 56 is retained in the port 48 closing position (Figure 6) andan air pressure hose 10 constituting an outlet 4for fluid under pressure, is applied to the outer end of the stem 62 causing fluid under pressure to pass through the passage 64, the channels or passages 63 and the conduit 52.

The latter operation' may be used'as an emergency measure when the chamber 34 is empty or devoid of any appreciable pressure; Then, the ilexible hose 10 is threaded by the coupling 66 or the coupling 'l2 to the threaded outer end of the valve stem 62, while the other coupling on the flexible hose 10 is threaded or simply slipped on f the various valve stems of the iniiated tires of the vehicle. The fittings-66 and 12 are provided with small projections interior thereof in order to operate the valvestemsiof the standard valves After 1. In a jack, a housing comprising a plurality of extensibly connected tubular sections, a base secured to the bottom section, a bladder disposed in the bottom section, the top section having a base wall contacted by said bladder and adapted to be extended with respect to said bottom section when said bladder is inflated, said top section being closed to constitute a pressure chamber, a fluid inlet member openinginto said chamber, a valve case with a port opening into said chamber. and a conductor opening into said bladder and said valve case, a valve including a stem and dis- -posed in said case, said valve being arranged to said rst section, said bladder constituting a -fiU in the valve holders of tires and the stems pro- J-f) jecting from the standard valves 66 or 44.

Having described the invention, what is claimed as new is:

motor to lift said iirst section, and a valve to regulate the admission of fluid under pressure located in a means of conducting iluid under pressure from said chamber into said bladder.

3. The combination of claim 2 and said valve having a passage therein and arranged to constitute an air inlet assembly to direct air from an outside source directly into said bladder.

4. The combination of claim 3 and an inlet member having a valve operatively connected with said first section and opening into said chamber to charge said chamber.

-' RAYMOND CARNAHAN.

REFERENCES CITED The followingr references are of record in the le of this patent: I

UNITED STATES PATENTS France July 3, 1924 

